Kobold HND-P231 User manual

Operating Instructions
for
Manual Pressure Measuring Devices
with External and Integrated Pressure
Sensors
Model:
HND-P231 HND-P233
HND-P236 HND-P239

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1. Contents
1.Contents ........................................................................................................ 2
2.Note .............................................................................................................. 3
3.Instrument Inspection .................................................................................... 3
4.Regulation Use ............................................................................................. 3
5.Operating Principle ........................................................................................ 4
6.Electrical Connection .................................................................................... 4
6.1Mains Operation with Power Supply .................................................... 4
7.Operation ...................................................................................................... 5
7.1General ................................................................................................ 5
7.2Connections ......................................................................................... 6
7.3Display ................................................................................................. 6
7.4Basic Operation ................................................................................... 6
7.5Operation ............................................................................................. 7
7.6Pop-up clip ........................................................................................... 8
7.7Configuration ....................................................................................... 9
8.Remarks to special features ........................................................................ 11
8.1Different Kinds of Measuring: „rAtE-Slo, -P.dEt, -FASt“ ..................... 11
8.2Sea Level Correction (only for HND-P239) ........................................ 11
8.3Averaging Function ............................................................................ 12
8.4Operation of Logger ........................................................................... 13
8.5The Serial Interface ........................................................................... 16
8.6Pressure Connection ......................................................................... 18
8.7Error and System Messages .............................................................. 19
8.8Calibration Services ........................................................................... 19
9.Maintenance ............................................................................................... 20
9.1Battery Operation ............................................................................... 20
10.Technical Information .................................................................................. 20
11.Order Codes ............................................................................................... 22
11.1Accessories ....................................................................................... 23
12.EU Declaration of Conformance ................................................................. 24
Manufactured and sold by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
Internet: www.kobold.com

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2. Note
Please read these operating instructions before unpacking and putting the unit
into operation. Follow the instructions precisely as described herein.
The instruction manuals on our website www.kobold.com are always for currently
manufactured version of our products. Due to technical changes, the instruction
manuals available online may not always correspond to the product version you
have purchased. If you need an instruction manual that corresponds to the
purchased product version, you can request it from us free of charge by email
([email protected]) in PDF format, specifying the relevant invoice number and
serial number. If you wish, the operating instructions can also be sent to you by
post in paper form against an applicable postage fee.
The devices are only to be used, maintained and serviced by persons familiar
with these operating instructions and in accordance with local regulations
applying to Health & Safety and prevention of accidents.
When used in machines, the measuring unit should be used only when the
machines fulfil the EC-machine guidelines.
3. Instrument Inspection
Instruments are inspected before shipping and sent out in perfect condition.
Should damage to a device be visible, we recommend a thorough inspection of
the delivery packaging. In case of damage, please inform your parcel service /
forwarding agent immediately, since they are responsible for damages during
transit.
Scope of delivery:
The standard delivery includes:
 Manual Pressure Measuring Devices with External and Integrated Pressure
Sensors model: HND-P231/HND-P233/HND-P236/HND-P239
4. Regulation Use
Any use of the Manual Pressure Measuring Devices with External and Integrated
Pressure Sensors, which exceeds the manufacturer’s specification may invalidate
its warranty. Therefore, any resulting damage is not the responsibility of the
manufacturer. The user assumes all risk for such usage.

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5. Operating Principle
The highly precise KOBOLD hand-held pressure measuring devices HND-P231/-
P233/-P236 are measuring devices with integrated pressure sensors. They have
two pressure measurement inputs on the top of the housing, which are connected
to the measuring points by means of stable metal connections and plastic hoses
that are available as accessories. Numerous measuring ranges in the
overpressure and under pressure range are available for various measurement
tasks, such as differential pressure measurement. In addition to pressure display,
these first-rate, compact, universally applicable measuring units offer additional
functions such as minimum/maximum value memory, a hold function, tare
function, automatic self-shut-off, or zero point offset. The devices with an
expanded spectrum of functions also have a logger function, a peak value
memory, minimum/maximum alarm, an adjustable measuring cycle, and
averaging.
The KOBOLD hand-held pressure measuring devices HND-P239 have an
integrated pressure sensor for absolute pressure measurement. The measuring
device is connected to the measuring point by means of a stable, metal
connection on the top of the housing and an optional plastic hose. This device
design offers the possibility of also displaying the barometric air pressure in
relation to sea level »zero«. In this case, air pressure is corrected by entering the
height above »zero« in meters. Naturally, these devices also have the
minimum/maximum value memory, a hold function, a tare function, automatic
self-shut-off function, and zero point adjustment. The KOBOLD HND-P239
devices also offer additional functions like the logger function, peak value
memory, minimum/maximum alarm, an adjustable measuring cycle, and
averaging.
6. Electrical Connection
6.1 Mains Operation with Power Supply
Warning: When using a power supply please note that operating
voltage has to be 10.5 to 12 VDC. Do not apply overvoltage!! Cheap
12 V-power supplies often have excessive no-load voltage. We,
therefore, recommend using regulated voltage power supplies.
Trouble-free operation is guaranteed by our power supply HND-
Z002. Prior to connecting the power supply to the mains, make
sure that the operating voltage stated at the power supply is
identical to the mains voltage.

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7. Operation
7.1 General
7.1.1 Safety Requirements
This device has been designed and tested in accordance with the safety
regulations for electronic devices. However, its trouble-free operation and
reliability cannot be guaranteed unless the standard safety measures and special
safety advises given in this manual will be adhered to when using the device.
1. Trouble-free operation and reliability of the device can only be guaranteed if
the device is not subjected to any other climatic conditions than those stated
under Technical Information.
If the device is transported from a cold to a warm environment condensation
may cause in a failure of the function. In such a case make sure the device
temperature has adjusted to the ambient temperature before trying a new
start-up.
If there is a risk whatsoever involved in running it, the device has to be
switched off immediately and to be marked accordingly to avoid re-starting.
Operator safety may be a risk if:
 there is visible damage to the device
 the device is not working as specified
 the device has been stored under unsuitable conditions for a longer
period of time.
In case of doubt, please return device to manufacturer for repair or
maintenance.
2. When connecting the device to other devices the connection has to be
designed most thoroughly as internal connections in third-party devices (e.g.
connection GND with protective earth) may lead to undesired voltage
potentials that can lead to malfunctions or destroying of the device and the
connected devices.
3. Do not use these products as safety or emergency stop devices or in any
other application where failure of the product could result in personal injury or
material damage. Failure to comply with these instructions could result in
death or serious injury and material damage.
Warning: If device is operated with a defective mains power
supply (e.g. short circuit from mains voltage to output voltage)
this may result in hazardous voltages at the device (e.g. at sensor
socket or interface).

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7.2 Connections
Connection for pressure tubes:
„+“ = higher pressure, „-“ = lower pressure
Interface: Connection for el. isolated interface adapter
(p.r.t. chapter 8.5 Serial Interface)
The mains adapter socket is located at the left side of the device.
7.3 Display
7.4 Basic Operation
Please Note: Activating/deactivating tara clears the max- & min-
memories.

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1) Zero-Point Adjustment: If there is no pressure or zero-pressure (absolute)
applied to the pressure ports the device will display 0. If there is a permanent
deviation (and device is operated under steady conditions), a permanent zero
point adjustment can be carried out. To carry out the adjustment press button 3
for approx. 5 seconds (Auto Null will be displayed shortly). The adjustment is
done via the OFFSET-value of the sensor (referring configuration menu).
To recall the manufacturer’s calibration press button 3 for approx. 15 seconds.
Please Note: A zero-point adjustment can only be carried out if
the difference between the value on display is less than 500
digits!
If a zero point adjustment was carried out the display shows
”Corr” after a restart .
7.5 Operation
After turning on, if the logger function is not off, the time of the integrated clock
will shortly be displayed. If a zero point adjustment was carried out the display
shows shortly „nuLL Corr“.
After changing the battery the clock-setting menu is activated automatically
(‚CLOC‘). Check the clock and adjust, if necessary (p.r.t. chapter 7.7).

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7.6 Pop-up clip
Handling:
 Pull at label “open” in order to swing open the pop-up clip.
 Pull at label “open” again to swing open the pop-up clip further.
Function:
 The device with a closed pop-up clip can be plainly laid onto a table or
attached to a belt, etc.
 The device with pop-up clip at position 90° can be set up on a table, etc.
 The device with pop-up clip at position 180° can be suspended from a
screw or the magnetic holder.

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7.7 Configuration
To change device settings, press Menu (key 4) for 2 seconds. This will call the
configuration menu (main display: „SEt“).
Pressing key Menu changes between the menues, pressing (key 3) jumps to
the refering parameters, which can be selected with key (key 3).
The parameters can be changed with  (key 2) or  (key 5).
Pressing Menu again jumps back to the main configuration menu and saves the
settings.
Quit (key 6) finishes the configuration and returns to standard measuring
operation.
Menu PARAM. Values Meaning
C_log
C_dat
Stor
‚Menu‘   or 
SEt
ConF
Set Confi
g
uration: Generic Confi
g
urations
Unit mbar,bar.. Unit: Unit of display * *
SL oFF/on Sea-Level: Sea level correction on/off (only HND-P239) * *
Alti -2000…9999 Altitude: Input of altitude above sea level [m] (only if SL=on)
(only for HND-P239)
* *
rAtE Rate: Measuring rate (p.r.t. chapter 8.1) * *
Slo Slow measuring rate (4 Hz filtered, low power consumption) * *
FASt Fast measuring rate, filtered (>1000 Hz) * *
P.dEt Peak detection: fast measuring rate, unfiltered (>1000 Hz) * *
t.AVG 1-120 Averaging period in seconds, used by the averaging function * *
oFF Averaging function deactivated * *
P.oFF 1-120 Auto Power Off time in minutes
oFF
A
uto Power Of
f
deactivated
Out oFF Function of the outout: No outout function, lowest power
consumption
SEr Output is serial interface
dAC Outout is analogue output 0…1 V
Adr. 01,11..91 Base address of interface
dAC.0 p.r.t.
chart Enter desired value at which the analogue output
potential should be 0 V
(
if Out=dAC
)
dAC.1 p.r.t.
chart Enter desired value at which the analogue output
potential should be 1 V
(
if Out=dAC
)
Set
CAL Set Calibration: Ad
j
ustment of Sensor *
OFFS p.r.t.
chart The offset of sensor will be displaced by this value to
compensate for deviations in the probe or in the
measurin
g
device.
*
OFF Zero displacement inactive
(
=0.00
)
*
SCAL -2.000…
2.000 The measuring scale of sensor will be changed by this
factor [%] to compensate deviations of temperature probe
or measurin
g
devices
*
oFF Scale correction factor inactive
(
=0.000
)
*

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Menu PARAM. Values Meaning
C_log
C_dat
Stor
‚Menu‘   or 
Set
AL. Set Alarm: Settin
g
s Of Alarm Function
AL. On Alarm on, with horn-sound
no.So
A
larm on, without horn-sound
oFF
A
larm deactivated
AL.Lo p.r.t.
chart
Min alarm rail (not when AL. oFF, Sensor-Min is the lower
displa
y
ran
g
e of connected sensor
)
AL.Hi p.r.t.
chart
Max alarm rail (not when AL. oFF, Sensor-Max is the
upper displa
y
ran
g
e of connected sensor
)
SEt
LoGG
Set Lo
gg
er: Confi
g
uration Of Lo
gg
er Function * *
Func CYCL C
y
clic: lo
gg
er function ‚c
y
clic lo
gg
er‘ ***
Stor Store: lo
gg
er function ‚individual value lo
gg
er‘ ***
oFF no lo
gg
er function ***
CYCL 1..3600 Cycle time of cyclic logger [seconds] * *
Lo.Po on/oFF Low-power logger with very low power consumption
(only for cyclic logger and slow measuring rate)
* *
SEt
CLOC
Set Clock: Settin
g
Of Real Time Clock
CLOC HH:MM Clock: Setting of time hours:minutes
dAtE TT.MM Date: Setting of date day.month
YEAr YYYY Year: Setting of year
C_log: cyclic Logger (active) C_dat: cyclic logger with data (no active logging) C_stor: individual value logger with data
Please Note: When using the logger function some settings in the
menu may not be accessible (*).
If these settings should be changed, the logger has to be stopped
before, eventually the logger data has to be cleared. (key 6, p.r.t.
chapter 8.4)
device type analog output adjustment of
senso
r
alarm function
dAC.0/dAC.1 OFFS
A
l.Lo
A
l.Hi
HND-P231 -1.00…25.00 mba
r
-5.00...5.00 mba
r
-1 mbar…AL.Hi
A
L-Lo…25 mba
r
HND-P233 -10.0…350.0 mba
r
-50.0…50.0 mba
r
-10 mbar…AL.Hi
A
L.Lo…350 mba
r
HND-P236 -100…2000 mba
r
-500…500 mba
r
-100 mbar…AL.Hi
A
L.Lo…2000 mba
r
HND-P239 0…13000 mbar abs. -500…500 mba
r
0 bar…AL.Hi
A
L.LO…1300 mba
r

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8. Remarks to special features
8.1 Different Kinds of Measuring: „rAtE-Slo, -P.dEt, -FASt“
Three different kinds of measuring pressure are supported. Two of them are
working with high measuring frequency of more than 100 measurings per second.
If one of them was chosen in the configuration (see above), this will be displayed
in the secondary display: „P.dEt“ or „FASt“.
8.1.1 rAtE-Slo: Standard Measuring
Measuring rate 4 Hz, averaging and filter functions are active.
Application: Measuring of slowly changing or static pressures, e.g. measuring of
leakproofness, athmospheric pressure...
Highest accuracy, high noise immunity (EMI and unstable measuring signals),
low power consumption.
8.1.2 rAtE-P.dEt: Peak detection
Measuring rate >1000 Hz, the value is displayed unfiltered.
Application with logger function: Measuring of short pressure peaks or fast
changing pressures with a resolution of < 1 ms. The cyclic logger function records
the arithmetic mean value, the highest and the lowest peak of the referring time
interval.
Attention: higher power consumption, measuring is sensitive to noise (EMI,..).
8.1.3 rAtE-FASt: Fast filtered measuring
Measuring rate >1000 Hz, the value is filtered slightly (higher noise immunity than
P.dEt, small peaks will be filtered out), apart from that identical behavior like
P.dEt.
8.2 Sea Level Correction (only for HND-P239)
The device displays the absolute pressure measured at the sensor. This is not
necessarily the same like the values given by weather stations! The weather
stations‘ values are giving the pressure at sea level. Usually, the sensor is placed
above sea level and therefore, if the value at sea level (zero) is to be measured,
the pressure loss resulting from the actual level above sea level has to be
considered! To correct the measuring display, activate the „Sea-Level-Function“.
Then enter the altitude above sea level of the sensor‘s location in meters (Alti,
p.r.t. chapter 7.7). When activated, the display shows the SL-arrow and the
device displays the pressure value at sea level.

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8.3 Averaging Function
The averaging function concerns the display values (LCD and interface). It is
completely independent from the averaging of the logger function, please don’t
mix them up!
The averaging integrates the measuring values during a selectable period of time
and then calculates the average display value. It is independent from the selected
kind of measuring (slow, fast, peak detect).
As long as not enough values are collected (selected averaging time) to calculate
a average value, the upper display shows “----“, the lower display a ‘countdown‘.
During an active low-power-logging procedure the avering is always deactivated
Function of min/max-value memory during averaging:
 If averaging is activated and slow measuring is selected (rAtE-Slo), the min-
/max-value memory refers to the average display value.
 If averaging is activated and fast measuring is selected (rAtE-FASt or P.dEt) ,
the min-/max-value memory refers to the internal measured values (fast peaks
can be detected).
8.3.1 Power off Time
If there won’t be pressed any key and no interface communication takes place for
the time of the power off time setting (P.Off), the device will be switched off
automatically to save battery power.
If P.oFF = oFF then the automatic switch off is deactivated.
8.3.2 Address
Up to 10 devices of the HND-handheld-family can be connected to a serial
interface at once (depending on interface converter). To get access to each
device the base addresses of the devices have to be different. For example,
choose 01 for the first, 11 for the second device and so on. See also chapter 8.5
Serial Interface.
8.3.3 Alarm
There are three possible settings: Alarm off (AL. oFF), on with horn sound (AL.
on), on without horn sound (AL. no.So).
Following conditions will display an alarm, when the function is activated (on or
no.So):
 Value is below lower (AL. Lo) or above upper alarm rail (AL.Hi).
 Sensor error (Sens Erro)
 Low battery (bAt)
 Fe 7: System error (always with sound)
In case of an alarm and when polling the interface, the prio-flag is set in the
returned interface message.

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8.3.4 Real Time Clock
The real time clock is used for the logger function: Recorded values are also
containing the point of time, when they were measured. Please check the settings
when necessary.
If the battery was replaced the referring menu ‚CLOC‘ will automatically be
started.
8.4 Operation of Logger
The device supports two different logger functions:
„Func-Stor“: each time when „store“ (key 6) is pressed a measurement will
be recorded.
„Func-CYCL“: measurements will automatically be recorded each interval,
which was set in the logger menu ‚CYCL‘ until the logger will
be stopped or the logger memory is full. The recording is
started by pressing „Store“ 2 seconds.
The logger records 3 measurement results each time:
current or mean value (depending on logger setting, see below), min peak and
max peak.
Min and max peak are the minimum resp. the maximum of the measured values
since the last recording.
Using them allows f.e. analysis of fluctuating pressures.
For the evaluation of the data the software HND-Z034 has to be used. The
software also allows easy configuration and starting of the logger.
When the logger is activated (Func Stor or Func CYCL) the hold function is no
more available, the key 6 is solely used for the operation of the logger functions.
8.4.1 Func-Stor“: Storing Single Measurements
Each time when „store“ (key 6) is pressed a measurement and its time stamp will
be recorded.
The recorded data can be viewed either in the display (when calling the
configuration an additional menu „REAd LoGG“ is displayed, see below) or by
means of the interface and a PC.
Max. number of measurings 99
A measuring contains: - current measuring value at the time of recording
- min peak, max peak since the last recording
- time and date of the recording
After each recording „St. XX“ will be displayed for a short time. XX represents the
number of the recording.

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If logger memory contains recordings already:
When „Store“ is pressed for 2 seconds, the choice for clearing the logger memory
will be displayed:
If the logger memory is full, the display will show:
Viewing Recorded Measurings
Within the „LoGG Stor“ function the measurings can be viewed directly in the
display not only by means of a computer (like at „Func CYCL“): press 2 seconds
„Set“ (key 4): The first menu displayed now is „rEAd LoGG“ (read logger data).
After pressing  (key 3) the measurement recorded last will be displayed,
changing between the different values referring to the measurement also is done
by pressing .
Changing the measurement is done by pressing the keys  or .
8.4.2 „Func-CYCL“: Automatic Recording with Selectable Logger-
Cycle-Time
The Logger-Cycle-Time is setable (p.r.t. configuration).
For example „CYCL“ = 60: A measuring is recorded after each 60 seconds.
When the slow measurement "rAtE-Slo" is chosen, additionally a low power
function is available: „Lo.Po“.
If „Lo.Po“ is on, the device only will take a measurement at the point of time of the
recording. In between the recordings the measuring shut’s down. This decreases
the power consumption enormously and therefore is recommended e.g. for long
time recordings where no mains adapter is available.
Max. number of measurings: 10000
Cycle time: 1...3600 seconds (=1 h), selectable in the
configuration
A measuring contains:
 rAtE SLo: - current measuring value at the time of recording
- min peak, max peak since the last recording
 rAtE FASt,P.dEt - arithmetic mean value since the last recording
- min peak, max peak since the last recording
Clear all
recordings
Clear the last
recording
Clear nothing
(cancel menu)

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Starting a recording:
By pressing "Store" (key 6) for 2 seconds the recording will be initiated. After that
the display shows ‘St.XXXX‘ for a short time whenever a measuring is recorded.
XXXX is the number of the measuring 1..10000.
If the logger memory is full, the display will show: The recording
If Low-Power-Logger-Function „Lo.Po = on“ the device switches itself off as soon
as the memory gets filled.
Stopping the recording manually:
By pressing "Store" (key 6) the recording can be stopped manually. Then the
following choice appears:
The selection can be made by  (key 2) and  (key 5). "Quit" (key 6) enters the
choice.
Note: If you try to switch off the instrument in the cyclic recording
operation you will be asked once again if the recording is to be
stopped. The device can only be switched off after the recording
has been stopped! The Auto-Power-Off-function is deactivated
during recording!
Clear Recordings:
When „Store“ is pressed for 2 seconds, the choice for clearing the logger memory
will be displayed:
The selection can be made by  (key 2) and  (key 5). "Quit" (key 6) enters the
choice.
Stop the
recording
Do not stop the
recording
Clear all
recordings
Clear nothing
(cancel menu)

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8.5 The Serial Interface
By means of the serial interface and a suitable electrically isolated interface
adapter (HND-Z031) the device can be connected to a computer for data transfer.
To avoid transmission errors, there are several security checks implemented e.g.
CRC.
The following standard software packages are available:
 HND-Z034: Operation and read out of logger function, data display in
diagrams and tables
 BUS-S20M: 20-channel software to display the measuring values
The device has 3 channels:
1: current measuring value (base address)
2: min peak (p.r.t. chapter 8.4)
3: max peak (p.r.t. chapter 8.4)
Note: The measuring-/ alarm- and display range values read back
from the interface are always in the selected measurement unit
(mbar, bar...)!

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Supported functions:
Channel Code Name/Function Channel Code Name/Function
1 2 3 1 3
x x x 0 Read measurement value x x x 201 Read max displa
y
ran
g
e
x x x 3 Read s
y
stem state x x x 202 Read displa
y
ran
g
e - uni
t
x 6 Read min memor
y
x x x 204 Read displa
y
ran
g
e
–
decimal poin
t
x 7 Read max memor
y
x 208 Read # of channels
x x x 12 Read ID number X 214 Read scale ad
j
ustment
x 22 Read min alarm rail
(
AL. -
A
L.Lo
)
X 216 Read offset ad
j
ustment
x 23 Read max alarm rail
(
AL. -
A
L.Hi
)
X 220 Read offset ad
j
ustment
x 32 Read configuration flag
BitAlarmOn:1; BitAlarmSound:3;
BitPeakDetection:33; BitFastFiltered:34;
BitLoggerOn:50; BitCyclicLogger:51;
BitLowPowerLogger:52
X 221 Read altitude *
x 222 Set altitude *
x 223 Set power off time
(
Conf-P.oFF
)
x x x 224 Logger: Read data of CYCL-
Lo
gg
er
x 102 Set min alarm rail (AL. - AL.Lo) x 225 Logger: Read cycle time (LoGG -
CYCL)
x 103 Set max alarm rail (AL. - AL.Hi) x 226 Logger: set cycle time (LoGG -
CYCL
)
x 160 Set confi
g
uration fla
g
(
refer to 32
)
x 227 Lo
gg
er: start recordin
g
x 174 Clear min memory x 228 Logger: Read # of recordings
made
x 175 Clear max memor
y
x 229 Lo
gg
er: Read state
x x x 176 Read min measurin
g
ran
g
e x 231 Lo
gg
er: Read stop time
x x x 177 Read max measurin
g
ran
g
e x 233 Read real time clock
(
CLOC
)
x x x 178 Read measurin
g
ran
g
e
–
measurin
g
uni
t
x 234 Set real time clock
(
CLOC
)
x x x 179 Read measurin
g
ran
g
e
–
decimal poin
t
X 236 Read lo
gg
er memor
y
size
x x x 180 Read kind of measurin
g
of sensor X 240 Rese
t
x x x 199 Read kind of measurin
g
of displa
y
X 254 Pro
g
ram version
x x x 200 Read min displa
y
ran
g
e x 260 Lo
gg
er: read data of STOR lo
gg
er
* only available at HND-P239

HND-P231/-233/-236/-239
page 18 HND-P231/-233/-236/-239 K05/0422
8.6 Pressure Connection
8.6.1 Device type with absolute pressure (HND-P239)
Connect plastic tube to pressure port.
8.6.2 Device type with relative pressure
 For measurements of over pressure (refer to summary):
Connect plastic tube with internal dia of 4 mm to pressure port "+". Port "-" will
not be used!
 For measurements of under pressure (refer to summary):
Plug the tube to pressure port "-". The measuring range covers then up to max.
overpressure range.
Note: All values are displayed now as positive values. No minus
sign will be shown.
Example: it is possible to measure under pressure down to -25.00 mbar, the
display shows then the value 25.00 (no minus sign).
 For measurements of pressure differences:
Connect both plastic tubes with an internal dia of 4 mm to pressure port "+"
and "-"; make sure to apply higher pressure to port "+".
Measure ranges:
device t
y
pe over- or underpressure underpressure
HND-P231 -1.00…25.00 mba
r
-25.00…0.00 mba
r
HND-P233 -10.00…350.0 mba
r
-350.0...0.0 mba
r
HND-P236 -100…2000 mba
r
-2000…0 mba
r

HND-P231/-233/-236/-239
HND-P231/-233/-236/-239 K05/0422 page 19
8.7 Error and System Messages
Displa
y
Meanin
g
What to do?
Low battery power, device will only continue
operation for a short period of time Replace battery
Battery empty Replace battery
Mains operation without battery: wrong
voltage
Check power supply, replace it when
necessary
Logger data are read by the interface
When transfer completed the device
will automatically return to normal
measuring display, no remedy
necessary
No display or
confused
characters
device does
not react on
keypress
Battery empty Replace battery
Mains operation without battery: wrong
voltage or polarity
Check power supply, replace it when
necessary
System error Disconnect battery and power
supplies, wait shortly, then reconnect
Device defective Return to manufacturer for repair
Err.1 Measured value above allowable range Check: pressure above 350 mbar?
-> measuring value to high
Sensor defective Return to manufacturer for repair
Err.2 Measured value below allowable range Check: pressure below –10 mbar?
-> measuring value to low
Err.4 Sensor defective Return to manufacturer for repair
Err.9 Value is too low to be displayed, tara is set Check: display below -2000 (tara?)?
Err.7 System error Return to manufacturer for repair
8.8 Calibration Services
Calibration certificates – DKD-certificates – other certificates:
If device should be certificated for its accuracy, it is the best solution to return it to
the manufacturer.
Only the manufacturer is capable to do efficient recalibration if necessary to get
results of highest accuracy!

HND-P231/-233/-236/-239
page 20 HND-P231/-233/-236/-239 K05/0422
9. Maintenance
9.1 Battery Operation
If ´bAt´ is shown in the secondary display the battery has been used up and
needs to be replaced. The device will, however, operate correctly for a certain
amount of time. If ´bAt´ is shown in the upper display the voltage is too low to
operate the device; the battery has been completely used up.
The battery has to be taken out, when storing device above 50 °C.
Please note: We recommend taking out battery if device is not
used for a longer period of time!
10. Technical Information
HND-P231:
Measuring range1): -1.0 to 25.0 mbar
Overload2): max. 100 mbar
Resolution: 1 Pa (0.01 mbar)
Accuracy: ±0.3 % F.S.
(Hysteresis and linearity)
±0.4 % F.S.
(in the range of 0-50 °C)
Units: mbar, bar, Pa, kPa, PSI, m H2O
(display “m”)
HND-P233:
Measuring range1): -10.0 to 350.0 mbar
Overload2): max. 1 bar
Resolution: 0.1 mbar
Accuracy: ±0.2 % F.S.
(Hysteresis and linearity)
±0.4 % F.S.
(in the range of 0-50 °C)
Units: mbar, bar, kPa, MPa, mmHg, PSI, m H2O
(display “m”)
HND-P236:
Measuring range1): -100.0 to 2000.0 mbar
Overload2): max. 4 bar
Resolution: 1 mbar
Accuracy: ±0.2 % F.S.
(Hysteresis and linearity)
±0.4 % F.S.
(in the range of 0-50 °C)
Units: mbar, bar, kPa, MPa, mmHg, PSI, m H2O
(display “m”)